Code no.
Fault
E04
Mains undervoltage
E05
Mains overvoltage
E09
Turbine operation
E10
Blocking
*
E21
Overload
E23
Short-circuit
E25
Contacting/winding
E30
Module overheated
E31
Overheated power
section
E36
Electronic faults
* In addition to the LED display, the fault signal LED is continuously illuminated in red.
2) Warning signals
• The warning signal is indicated by the LED display.
• The fault signal LED and the SSM relay do not respond.
• The pump continues to run with limited output.
• The indicated faulty operating status must not occur for a prolonged period. The cause must be eliminated.
Code no.
Fault
Generator operation
E07
Dry running
E11
*
E21
Overload
* See also fault signal E21.
If the operating fault cannot be remedied, please consult a specialist technician or the nearest customer service
location or representative.
In order to ensure the service life of the pump, it is recommended that the unit run at least once every 2 weeks
(ensure that the pump is running) or keep it powered on for a long time (in the power-on standby state, the unit will
run the pump for 3 minutes every 6 hours)
Cause
Power supply too low on mains
side
Power supply too high on
mains side
The pump is driven in reverse
(the fluid flows through the
pump from the pressure to the
suction side)
The rotor is blocked
Sluggish motor
Motor current too high
Motor winding defective
Module interior too warm
Ambient temperature too high
Electronics defective
Cause
Pump hydraulics have fluid
running through them.
Air in the pump
Sluggish motor, pump is oper-
ated outside of its specifica-
tions (e.g. high module
temperature). The speed is
lower than during normal
operation.
NOTE
45
Remedy
Check mains voltage.
Check mains voltage.
Check flow, install non-return
valves if necessary
Request customer service
Request customer service
Request customer service
Request customer service
Improve room ventilation, check
operating conditions, request
customer service, if necessary
Improve room ventilation, check
operating conditions, request
customer service, if necessary
Request customer service
Remedy
Check the system
Check the water volume/
pressure
Check the ambient conditions